6005-t5 vs 6063-t6?

Aluminum (Al), % 97.5 to 99 97.5 to 99.4
Chromium (Cr), % 0 to 0.1 0 to 0.1
Copper (Cu), % 0 to 0.1 0 to 0.1
Iron (Fe), % 0 to 0.35 0 to 0.35
Magnesium (Mg), % 0.4 to 0.6 0.45 to 0.9
Manganese (Mn), % 0 to 0.1 0 to 0.1
Silicon (Si), % 0.6 to 0.9 0.2 to 0.6
Titanium (Ti), % 0 to 0.1 0 to 0.1
Zinc (Zn), % 0 to 0.1 0 to 0.1
Residuals, % 0 to 0.15 0 to 0.15